package yhp.com.zijie.web;

import yhp.com.zijie.bean.Users;
import yhp.com.zijie.service.UsersService;
import yhp.com.zijie.service.impl.UsersServiceImpl;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

@WebServlet(urlPatterns = "/login")
public class LoginServlet extends HttpServlet {



    @Override
    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        //接收参数
        String username = req.getParameter("username");
        String password = req.getParameter("password");
        System.out.println(username);
        System.out.println(password);

        System.out.println("================================================");
        //调用service
        UsersService usersService = new UsersServiceImpl();
        Users users = usersService.login(username, password);

        //判断返回的users中是否存在值
        if (users==null){
            //登录失败
            resp.setContentType("text/html;charset=utf-8");
            PrintWriter writer = resp.getWriter();
            writer.println("<script>location.href='login.jsp';alert('用户名或密码错误');</script>");
        }else {
            //登录成功，跳转页面
            req.getSession().setAttribute("users" , users);
            resp.sendRedirect("index.jsp");
        }
    }


}
